DealMasterMike They've commented multiple times that it is a very difficult feature to implement accurately, thus why most offerings from other vendors are inaccurate.  They are working on it according to their comments, but that it is very difficult to do so.

andrewf00  Very well put.  Perfection not needed, but something is.

andrewf00 Totally agree, just need to figure out what is using a lot of data so I can address it.

carter I agree, we have Xfinity and we keep hitting even that data cap. I'd really like to see this feature - not sure why this forum is so old yet there's still no feature for it

Jason As much as I hate to say it, it seems that Google Wifi has improved and is getting similar reviews to Eero at 1/2 the price and no annual subscription.  It has this feature and has had it for some time now.  I'm considering giving it a try.

carter yeah I wanted Google WiFi when we were getting our house but the best buy dude convinced my mom that eero was better :/

Jason eero is better. I came from Google wifi which at first was good until I had to reboot almost on a daily basis. 

Yes eero is missing this very important feature but I'm not going back to Google wifi. 

olsonware not sure if that's true - at least I've not seen the feature anywhere

Jason I found it online - I don't think it is precise enough to add value for me.  Search for Xfinity Gateway  -- good in concept though

olsonware oh yeah we had the gateway and it sucked I highly recommend you do not buy it - it's a router/modem and is like absolutely garbage

Jason I did a ton of research.  Ended up getting Plume.  Found the devices that are taking up bandwidth.  In addition, the mesh network part went from about 60-80 mbps to over 200 mbps throughout the house.  

johnrellis  Just one quick suggestion. I had the same problem when I first "cut the cable", and it turned out to be pretty simple. Streaming boxes, like the Roku for example, will continue to stream after you press the power button on the remote. That power button just turns off the TV. If you turned off the TV while the Roku or other streaming box was still in streaming mode, it will continue to do that. I had a couple of nights where the Roku used over 30GB. streaming...and that was enough. So I went back to a router that I had used previously, put LEDE firmware on it that provides per-client traffic data, and was able to find this problem.

Couple of ways of dealing with this:

1. Press the "Home" button on the remote before you press the power button. This stops any current streaming. This can be a problem with kids or elderly people (like me :-).

2. Use one of those master/slave power strips, where the TV is plugged into the master outlet, and your streaming box is plugged into a slave (called "power-saving" outlet, sometimes). Then a few seconds after you turn off your TV with the streaming box remote, your streaming box will be turned off. The obvious problem with this is that you have to wait for your streaming box to boot up when you want to use it. But this is the way that we have our guest room Roku set up, since we don't want to have to be telling guests to "press the Home button before you turn the thing off" all the time :-).

Oh, one more thing, if this is your problem, the new version of the Roku firmware, 9.2, has a sleep timer that you can enable that will essentially turn off the Roku after 4 hours of non-use. Not as good of a solution as NVIDIA Shield "sleep" timeout of 5 or 20 minutes, but a step in the right direction.